I have my mind made up--I am going to by a Tiffany Engagement Ring for my sweet, because, despite the anti-Tiffany sentiment on this board, nothing says love like the little blue box. Plus, on top of that fact, you are buying one of the best quality stones available, with over a hundred years of craftmenship and trust behind the product. The downside--a 20% mark-up, but isnt love and a peace of mind worth a few thousand dollars. Now, my question--what is the average sized stone for a classic solitare ring. I''m looking at a .80 stone with exceptional color and clarity. Is that too small? What is the norm? In advance thanks for your help.